It looks like the 4th season of Bordertown is on Netflix now. For those who didn't watch the first 3 seasons it's an excellent Nordic noir series set in a small town in Finland very close to the Russian border. From watching various Nordic noir series they all seem to involve twisted crimes, an exceptional police detective with serious personal problems, very bleak geography and/or weather, and iffy, vague morality. Bordertown is one of the best of the genre IMHO because of the detail in which the main characters are portrayed.
Others in the genre are Deadwind (Karppi), The Bridge (Bron/Broen), The Killing (Forbrydelsen), Trapped (Ófærð), The Valhalla Murders, and others. I recommend all of those.
If you want just a 1-season stab then maybe just watch the new season 4 of Bordertown. If you want to sink in I'd suggest starting with season 1. The end of season 3 made it seem like the series couldn't possibly continue (don't want to give away the reason) but apparently it has.
First 3 seasons were excellent, so I'll start season 4 tomorrow.
edit: lol, now I find out Season 4 of Bordertown is a movie, not a whole season